Don't wrap roots in Handle just to dereference immediately.

src/objects-inl.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // Review notes:
 //
 // - The use of macros in these inline functions may seem superfluous
 // but it is absolutely needed to make sure gcc generates optimal
 // code. gcc is not happy when attempting to inline too deep.
 //
@@ skipping 7849 matching lines @@
 }
 
 
 uint32_t UnseededNumberDictionaryShape::HashForObject(uint32_t key,
                                                       Object* other) {
   DCHECK(other->IsNumber());
   return ComputeIntegerHash(static_cast<uint32_t>(other->Number()), 0);
 }
 
 Map* UnseededNumberDictionaryShape::GetMap(Isolate* isolate) {
-  return *isolate->factory()->unseeded_number_dictionary_map();
+  return isolate->heap()->unseeded_number_dictionary_map();
 }
 
 uint32_t SeededNumberDictionaryShape::SeededHash(uint32_t key, uint32_t seed) {
   return ComputeIntegerHash(key, seed);
 }
 
 
 uint32_t SeededNumberDictionaryShape::SeededHashForObject(uint32_t key,
                                                           uint32_t seed,
                                                           Object* other) {
@@ skipping 534 matching lines @@
 #undef WRITE_INT64_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 #undef NOBARRIER_READ_BYTE_FIELD
 #undef NOBARRIER_WRITE_BYTE_FIELD
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_OBJECTS_INL_H_